Version 4
SHEET 1 1632 680
WIRE 1392 -192 1296 -192
WIRE 1456 -192 1392 -192
WIRE 992 -160 384 -160
WIRE 1072 -160 992 -160
WIRE 1344 -96 1296 -96
WIRE 464 48 416 48
WIRE 608 48 544 48
WIRE 704 48 608 48
WIRE 752 48 704 48
WIRE 384 80 384 -160
WIRE 1456 96 1456 -192
WIRE 1456 96 1296 96
WIRE 288 112 192 112
WIRE 352 112 288 112
WIRE 416 112 416 48
WIRE 608 112 608 48
WIRE 992 128 928 128
WIRE 1072 128 992 128
WIRE 1456 128 1456 96
WIRE 192 144 192 112
WIRE 1344 192 1344 -96
WIRE 1344 192 1296 192
WIRE 192 272 192 224
WIRE 416 272 416 192
WIRE 416 272 192 272
WIRE 608 272 608 176
WIRE 608 272 416 272
WIRE 1344 272 1344 192
WIRE 1344 272 608 272
WIRE 1456 272 1456 208
WIRE 1456 272 1344 272
WIRE 192 288 192 272
FLAG 192 288 0
FLAG 288 112 rx
FLAG 992 -160 78125Hz
FLAG 704 48 625rx
FLAG 1392 -192 10Meg
FLAG 992 128 625ref
SYMBOL voltage 1456 112 R0
WINDOW 0 -64 53 Left 2
WINDOW 3 -74 106 Left 2
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V1
SYMATTR Value SINE(0 1 9.999Meg)
SYMBOL voltage 192 128 M0
WINDOW 0 34 28 Left 2
WINDOW 3 -89 104 Left 2
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V2
SYMATTR Value SINE(0 1 77.5k)
SYMBOL Digital\\counter 1216 -224 M0
WINDOW 0 118 149 Left 2
WINDOW 3 -82 146 Left 2
SYMATTR InstName A1
SYMATTR Value cycles=128
SYMBOL bv 416 96 R0
WINDOW 0 36 84 Left 2
WINDOW 3 -120 113 Left 2
SYMATTR InstName B1
SYMATTR Value V = v(rx)*(v(78125Hz)-0.5)*2+0.5
SYMBOL res 560 32 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R1
SYMATTR Value 1k
SYMBOL cap 592 112 R0
SYMATTR InstName C1
SYMATTR Value 150n
SYMBOL Digital\\counter 1216 64 M0
WINDOW 0 115 -82 Left 2
WINDOW 3 -82 -83 Left 2
SYMATTR InstName A2
SYMATTR Value cycles=16000
TEXT 134 -72 Left 2 !.tran 0 1 0 10n
TEXT 784 64 Left 2 ;Software-\n    PLL
RECTANGLE Normal 928 224 752 -32 2